#include<iostream>
using namespace std;

class Person
{
public:
	int _a;
};

class Student: public Person
{
protected:
	int _b;
};

class Teacher: public Person
{
protected:
	int _c;
};

class Assistance:public Student,public Teacher 
{
protected:
	int _d;
};

int main()
{
	Assistance a;
	cout << sizeof(a) << endl;
	return 0;
}
